광대역 정규 프로세스에 대한 주파수 영역 기반 피로해석법의 적용성에 관한 연구 II : 광대역 피로예측 모델
Study on Applicability of Frequency Domain-Based Fatigue Analysis for Wide Band Gaussian Process II : Wide Band Prediction Models
정준모(인하대학교); 김경수(인하대학교); 남지명(인하대학교); 구정본(삼성중공업 조선플랜트연구소); 김민수(영국선급협회); 심용래(미국선급협회); 엄항섭(노르웨이선급협회)
49권 4호, 359~366쪽
초록
This is the final one of the two companion papers dealing with accuracy of accumulated fatigue damage estimation under wide band process. It is stated that four kinds of wide band models exist: typed of equivalent stress, combined PDF, correction factor, and damage combination. For the idealized ESDs from full scale measurement data on an 8100TEU container vessel, fatigue damages are compared for a narrow band prediction model based on Rayleigh PDF and five wide band fatigue prediction models of Dirlik, Wirsching-Light,Jiao-Moan, Benasciutti and DNV. DNV model consistently overestimates fatigue damages regardless of variation of ESDs. Predictions by Jiao-Moan model, which is understood as standard method for design of offshore platforms, are also in conservative side. Best accuracy is found from the results by Dirlik and Benasciutti models, but Benasciutti model is preferred since it can easily combined with narrow band fatigue damage based on Rayleigh PDF.
Abstract
This is the final one of the two companion papers dealing with accuracy of accumulated fatigue damage estimation under wide band process. It is stated that four kinds of wide band models exist: typed of equivalent stress, combined PDF, correction factor, and damage combination. For the idealized ESDs from full scale measurement data on an 8100TEU container vessel, fatigue damages are compared for a narrow band prediction model based on Rayleigh PDF and five wide band fatigue prediction models of Dirlik, Wirsching-Light,Jiao-Moan, Benasciutti and DNV. DNV model consistently overestimates fatigue damages regardless of variation of ESDs. Predictions by Jiao-Moan model, which is understood as standard method for design of offshore platforms, are also in conservative side. Best accuracy is found from the results by Dirlik and Benasciutti models, but Benasciutti model is preferred since it can easily combined with narrow band fatigue damage based on Rayleigh PDF.
- 발행기관:
- 대한조선학회
- DOI:
- http://dx.doi.org/
- 분류:
- 조선공학